An administrator manages a $4-$block $16-$node Nutanix cluster. One block experienced a Power Delivery Unit $($PDU$)$ failure. All nodes in that block power off. VMs on the affected nodes restart as expected. The cluster continues normal operation until power is restored. Which Nutanix feature is responsible for maintaining operations in this scenario?A$.$ IO RedirectionB. Async Disaster RecoveryC. Block AwarenessD. Nutanix App Mobility Fabric